Tool setting device on lathes and other machine tools



June 17, 1952' c. s. ARENGO TOOL SETTING DEVICE ON LATHES AND OTHER MACHINE TOOLS 5 Sheets-Sheet 1 Filed April 15, 1949 ara/Ir WO W 14425 adjgwa June 17, 1952 c. G. ARENGO 2,600,329

TOOL SETTING DEVICE ON LATHES AND OTHER MACHINE TOOLS Filed April 15, 1949' 5 Sheets-Sheet 2 June 17, 1952 c. e. ARENGO 2,600,329

TQOL SETTING DEVICE 0N LATHES AND OTHER MACHINE TOOLS Filed April 15, 1949 5 Sheets-Sheet s June 17, 1952 c. G. ARENGO TOOL SETTING DEVICE ON LATHES AND OTHER MACHINE TOOLS 5 Sheeis-Sheet 4 Filed April 15, 1949 t W @h E MW 0 Q If EL 2/ 3 mm Q m mN mmwv 9v 0% @v a Q o Q 8 mm av 9 C. G. ARENGO June 17, 1952 TOOL SETTING DEVICE ON LATHES AND OTHER MACHINE TOOLS 5 Sheets-Sheet 5 Filed April 15, 1949 Patented June 17, 195i? UNITED STATES A EN OFFliCE TOOL QD V N L TH N EBMA T Q Application Apr 15, 1949, Serial No. 87,551

Claims. 1 This invention --r'elates to tool setting device's on lathes and other machine tools, particularly of the type wherein two or-more tools are mounted so as to be brought into operation on the work in succession.

In known forms of apparatus of the type de seribedth'e tools' which may-be drills, .arelmonnted on rotatable or non-rotatable spindles, and are adapted to be advanced and retracted in se-- qunce in remtmnmtne worn, and the head 0'1 other-dev-i'ee on which the tools and/or their spindles aremonnted has to beindex'ed in order tit-h ring the required 'tebl into 'reg istratidnlw ith the-work. The indiiing operation can bnly be carried out-when the spindle earrying a tooliha's been retracted and prior to another tool beingiadvance'a', and considerable time-is lostin'so retracting a tool, indexing the head, and advanc ing-a'nther tool-to it's operative position.

The :object of the presentlinvention is -to .provide improvements in devices of the type .de-

scribed-whereby the time occupied in the various setting operations may be reduced.

Aceording to this-inventions tool .spindle;carher is pivotally-monnted on :a bedplate or like member, twb or more tobl spindles larel mbiinted in "the carrier and a-re adapted for axial: movement lll the carrier, the directionnfisuchaxial movement preferably being iparallel ton'the axis of pivotal movement of I the carrier, means are provided to effect said axial 'movement, .said means comprising a luniversaljoint means are provided to "e'ffeetp'ivotalimovem'eht dithesaid carrier, and the said -means for 'eiTeoting axial movement of the tool spindles andf'or efiecting pivotal movement of the 'oarrier Yare'inte'rconnected sofas to be actuated simultaneously.

In the aee'ompanying drawingsz Fig. '1- is a substantially diagrammatic. side'elevation of anautomatiolathe incorporatinglone form of the invention.

Fig. 2 1s .a sideelevation, to e largescalaei themeehanismof the invention,

Fig; 3 is a-plan viewand 'lFig. 451s and end elevation, looking :from .the right of?Fig.-2.

=Fig.= 5' isnanend elevationof a modified form of theimzentionr and Fig. 6 is a longitudinal sectional elevation, taken on line VL-VIof Fig. 5.

Referring to Figs. 1 to 4, the work-piece H, which may bela stock bar, is disposedina chuck 10 andya hollow, spindle H, the spindle being rotated lay-driving, mechanism indicatedat; l2 and also being supported by a stand 13 and amountagainst rotation in the carrier 1 I ing #4 on the machine base or bed 13. A tool spindle carrier H is pivotaily mountedon a spin die [2 on the bed 13 of the machine, the axisof the pivot spindle l2 beingparallel withthe aids of theWork-piece .M. The carrier l l"'compr'ises a head 15 in which two .tool spindles 16 ,111 are slidably mounted so as tolbe're'ciprocated:therein. The axes of the spindles i6, lll'areparall'elwith the axis of the spindle I2 and with the aic'is'of the Work-piece M, and all of said 'axes'arehori' zontal. The aXes" of the spindles" SIB 1.1 are'jboth disposedat the same radius from the axisoi' the carrier pivot, and said radius is equal to the straight line distance betweenithe'- axis of the carrier pivot 12 and the axis of the work piee'e l4 so that b'y' moving the carrier il l Parcuatel'y about its pivot l2 either of the tool spindles'lfi. I] may be brought with its axis into'aligiiment withtheiaxis of the work-piecellfl;

The pivotal movement of the carrier 11.1 is effectedby .a bell-crank lever I18 mounted one. piJvot I Q and having a roller .20 onl'the en'd'of one arm 2| adapted to abut a track 122 o'i'r'onesidje of the carrier headlifi, a :roll'er.i23 'onitheendof the .other arm 24 of said lever-being adapted-to be engaged Joya cam .25jmo'nnte'd on a spindle so .las jto-be rotated therewith. Asithee'amxfi rotates, .the-1ever. Isis rocked so asto m'ovethe carrier I l arcuately on its pivotxl 2; return'move mentof the fcar'rier H is eiiectedbyatension spring 21 connected .by one end: to the carrier head 1 Band by its other end to aifixed anchorage 28 so..a=s. to operate in opposition tothe bellcrfank lever-l8. i stopsifl, J30 onthefbedilftar'e adapted to be abutted by adjilstabl'estuds'3 1:32 in'lugs v33', 34 on the carrier mess 1 35 "so as to limit the arou'ate movement of, the oar-rierito bring eitherflof, the toolgspindles L6, IT intojalignment'with thevwork-lpiece'l l.

A lever 36 is piVDtallvgmOunted by a pivot rod 31 on a rearwardly. and upwardly exte dmeno tion as of thehedplate; :A. bra'cke't 39 is'iiii idl mounted onthe rearendwofithetool spi'n'dle;l'l, the i saidbracket .being provided with a ppin' Ail adapted tolprojectgintola'ncl slide in, a longitudihal slot 4! ,in,a rearwardly.extendingpontiomflfcif the a ri 1 l whe by thesp ndle lFiSzI'ESFIQiHfi p n wo ts thr ded v connented f r a justability in e gth, is disnpsed'ibetween the upper end of the lever 36 3,1141: the-bracketjfl, b n e v th 4 re os nei a-cu sehu 12 7 th bracket e da'. .m h eciinehu m t i sa sne r, en b the even hear ane tbei e u that r d form annivezisall jointed push-rod between the lever and the bracket; the rod is retained between the lever and the bracket by a tension spring anchored to the lever and to the bracket. The tool spindle I6 is similarly associated with a lever 41, also pivotally mounted on the rod 31, by means of a bracket 48, ball-ended adjustable push-rod 49, cup abutment 50 on the bracket, a cup abutment in the end 5| of the lever, and a tension spring 52, the bracket 48 being provided with a pin 53 projected into and sliding in a slot 54 in the carrier extension 42. A camshaft 55 is provided, on which two cams 53, 51 are mounted, and each cam is adapted to co-operate with the lower ends of the levers 36, 41, respectively, so that as the camshaft and cams are rotated the said levers are rocked on their pivot 31 so as to cause the respective tool spindles l6, l1 to be pushed forwardly in the carrier head I5, and tension springs 58, 59 anchored at one end to the bedplate extension 38 and at their other ends to the tool spindles l1, [6, respectively, operate to retract the tool spindles in the carrier head.

' The camshaft 55 and the camshaft 26 are interconnected by bevel gearing 66, 6|, so that all of the cams 25, 56 and 51 are rotated simultaneously, the rotational ratio being one to one. The relative timing of the cams 25, 56 and 51 is so adjusted that the sequence of operations is as follows: Assuming the tool spindle IE to be in alignment with and advanced up to the workpiece l4, on completion of the working operatlon the cam 51 releases the lever 41 whereby to allow the spindle l6 to be retracted from the work-piece and simultaneously the cam operates the lever l8 so as to move the carrier H about its pivot l2 to bring the tool spindle l1 into alignment with the work-piece; thereafter the cam 56 actuates the lever 36 to advance the tool spindle 11 up to the work as the carrier takes up its new position. On completion of this working operation the cam 56 releases the lever to allow the spindle l1 to be retracted from the work-piece; simultaneously, the cam 25 releases the lever [8, the spring 21 returns the carrier II to the position with the tool spindle l6 in alignment with the work-piece, and. the cam 51 actuates the lever 36 to advance the tool spindle I6 upto the work as the carrier takes up its new position. The retraction of one tool spindle may overlap the advancement of the other tool spindle, provided that the tools are clear of the workpiece during the arcuate movement of the carrier. The provision of universal joints between the push rods 43, 49 and the levers 36, 41 and brackets 39, 48 enables the arcuate movement of the carrier and tool spindles to be effected without movement of the levers, 36, 41 other than such movement as is effected by the cams 56, 51.

Adjustable stops 62 on the bedplate extension 38 are adapted to limit rearward movement of the upper ends of the levers 36 and 41.

In the modified form of the invention illustrated in Figs. 5 and 6, wherein the tool spindle I1 .is rotatable and the spindle I6 is non-rotatable, the spindle I1 is splined at 88, and a correspondingly splined toothed gear wheel 8| is mounted thereon so that the spindle I1 and gear wheel may rotate together but may slide relatively to each other. The gear wheel 8! is in mesh with another toothed gear wheel 82 freely rotatably mounted on the spindle l2 and provided with a belt pulley 83 whereby it may be driven by a belt 84 from the main drive of the machine. A rod 8.5 1s slidably mounted in the carrier head I5,

parallel to the spindle l1, and is connected to the lever 36 in the manner previously described with reference to the spindle l1 and lever 36 in Figs. 1 to 4. A forked bracket 86 is rigidly mounted on the rod 85 and engages an annular groove 81 on the spindle l1; thereby, the rod 85 is directly actuated by the lever 36 and its associated springs, and the spindle I1 is withdrawn or advanced by the rod 85. The spindle I6 is mounted and actuated in similar manner to that described with reference to Figs. 1 to 4, except that the pin 53 projects from one side of the bracket 48, Fig. 5.

When both tool spindles are adapted to rotate, and are rotatably driven by suitable means, a rod is slidably disposed in the carrier, parallel to the tool spindle, one such rod for each spindle, and each of said rods carries a fork adapted to embrace a spindle and co-operate with a collar on the spindle so that'as the said rod is reciprocated in the carrier the spindle is correspondingly reciprocated in the carrier head. The rod is connected by a universally jointed connecting rod to a cam-actuated lever in the manner hereinbefore described.

In some cases one cam-actuated lever and connecting rod may be provided for all of the tool spindles, the connecting rod being connected by suitable means to all of the spindles.

There may be three or more tool spindles provided in the carrier, with complementary camactuated levers and connecting rods, the timing between the reciprocation of the tool spindles and the arcuate movement of the carrier being adjusted so as to bring any one of the tools into registration with and operation on the work in a required sequence.

What I claim and desire to secure by Letters Patent is:

1. A tool-setting device for lathes and other machine tools comprising a tool spindle carrier mounted for pivotal movement about an axis parallel to the work-piece axis of the lathe, at

least two tool spindles mounted in the carrier and adapted for axial movement in the carrier, the direction of such axial movement being parallel to the axis of pivotal movement of the carrier, separate means continuously operatively connected to each said tool spindle for effecting said axial movement of tool spindles, each said means comprising a universal joint, and means for effecting pivotal movement of the said carrier,- the said means for effecting axial movement of the tool spindles and for effecting pivotal movement of the carrier being interconnected so as to be actuated simultaneously.

2. A tool-setting device for lathes and other machine tools comprising a tool spindle carrier mounted for pivotal movement about an axis parallel to the work-piece axis of the lathe, at least two tool spindles mounted in the carrier and adapted for axial movement in the carrier, the direction of such axial movement being parallel to the axis of pivotal movement of the carrier, separate means for effecting said axial movement of each. said tool spindle, and means for effecting pivotal movement of the said carrier, the said means for effecting axial movement of the tool spindles and for effecting pivotal movement of the carrier being interconnected so as to be actuated simultaneously, said means for effecting axial movement of each said tool spindle comprising a push rod, a universal joint operatively connecting said push rod at one end to said spindle, a lever, a universal joint operatively con-' necting said lever to the other end. of said push 5 6 rod, a cam engaging said lever, means for rotatnected to one of said cam-actuated levers by ing said cams, and a retracting spring operaone of said push rods. tively connected to each said tool spindle. CHRISTOPHER GUY ARENGO.

3. A tool-setting device according to claim 2, each said push rod comprising two parts thread- 5 REFERENCES CITED edly connected for adjustabmty in length- The following references are of record in the 4. A tool-setting device according to claim 2 file f this t; including means holding one of said tool spindles against rotation l UNITED STATES PATENTS 5. A tool-setting device according to claim.2, is Number Name Date one of said tool spindles being rotatable, and 851.742 Gates npra30, 1907 including a rod slidably mounted in said carrier 1,063,744 Seward "-,lune 3, 191-3 parallel to said tool-spindle, rotational drive FOREIGN PATENTS means for said spindle, means interconnecting said rod and said tool spindle to allow the spin 15 Number Country .D dle to rotate while being axially movable syn- 143432 Germany 1903 chronously with said rod,'said rod being con- 11,686 Great Britain "-Y 1915 

